Electric-switch handle.



J. G. PETERSON.

ELECTRIC SWITCH HANDLE.

APPLICATION FILED JUNE 15, 1909.

'941 ,534. Patented Nov. 30, 1909.

F/av/ Fla UNITE STATES PATENT OFFICE. JOHANN G. PETERSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE AJtROW ELEC- TRIC COMPANY, OF HARTFORiD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

' nnnc'rnic-swrron HANDLE.

Specification of Letters Patent. Patented Nov, Application filed June 15,1909. I Serial macaw.

To all whom 'itma/y concern:

. Be it known that I, JOI-IANN GODFREY PETERSON, a citizen of the United Sta'tes, residing atHartford, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Electric-Switch Handlesfofwhich the follow ingr is a specification.

. his inventionrelates to those turn button handles for rotary snap electric switches, which have yielding stems. {Such handles when screwed upon the actuating spindles are utilized for rotating the spindles and for holding the covers or plates tightly in position, regardless of variations in the lengths of the spindles or of inaccuracies in the dimensions of the porcelain bases and other parts of .the switches. I

The. ob'ect of this invention is'the pro duction 0 a handle of this nature which .is

: very simple and cheap to construct and is eflicient'and durable in use.

The invention is particularly applicable to the construction of turn button handles scribed herein in connection with such a handle, althoughthe invention may be utilized inconstructing handles-of other materials'.

Figure of the accompanying'drawings' shows a side elevation o embodies the invention. Fig. 2' showsa top view. Fig. .3 shows a, bottom view. Fig.

4 shows a centralsection. Fi 5 shows a central sectiongofthe bodyo the handle withoutth yielding means for attaching it to a switch handle, and'FigJG sho'wsthe attaching means separated. I,

The bodyof the handle 1 may he made b of porcelain or other substance, in any de-- sired deslgn andrequiredslze.

I In the handle and o ening from the innerfaceis'a-central .'cylin rical" socket 2. Extending laterally 3. Thesegrooves continue entirely from opposite sides of this socket are grooves tnrough the handle from the inner to the outer face.

In the outer face of the handle at'the ends of thegrooves are recesses 4 formed so as to 150i the handle.

.convenienttool the yoke is a.- handle which project into the grooves, so that while the head and stem are free to move longitudinally in the handle, they are not free to retate independently of the handle. On the stem and thrustin against the head is a spiral spring 8. The outer end of the stem projects throufigh the'end of a yoke 9, which 1s shaped to 11 the end of the opening 1n The prongs 10 of the yoke occu y the grooves that extend through the hen Is at the sides of thecentral socket, and the tips 11 of the prongs are turned over in' the recesses in the outerface of the handle, against the shoulders 5.

In putting the parts'together the yoke, with its prongs straight, and with the stem and spring assembled, are placed in the openingin the. handle. By means of any pushed against the spring until the tips of its prongs project beyond the outer surface of the By means of a pair of pliers or other suitable tool, the ti s are bent over, after which the yoke is re eased. The spring then so presses against the yoke as to draw the bent tips of the prongs into the recesses in the outer surface of the handle.

When the stem of this handle is screwed upon a switch spindle, the inner face of thehandle presses against the outer surface of the cover, or plate, of the switch, the spring yielding so that the handle will'bea'r against the cover or plate with'a yielding force and firmly hold it in place. This handle cannot be maliciously tampered-with, as there are no screws to be-loosened. If, however, it is desired to take itt-o pieces for any reason, as for inserting a new spring, the yokenia be pushed into the handle so. the prongs wil pr0 ect beyond the outer face, and after the tips of the prongs are straightened, the

yoke and stem with the spring can be readily drawn from the opening in the handle.

The partswhich make u this handle are very simple to form, -readii assembled and tbe' organizationis strong,'durable and ellic'ent. Y

The invention claimed is: p

1. A switch handle having a socket that extends from the inner face but partly throu h the handle and openings that extend rom the recess to the outer face of the. handle, a yoke located in said socket and having its. ends extending into and bent over in the openings in the outer face of the handle, aheaded stein movable in the socket 7 and extending through the yoke, and a spring thrusting between the head of the stem and the yoke.

2. A switch handle having a body of insuhiting material with a socket extending from the inner face into the body and open ing's through the outer face of the body to the socket, a heeded stein movable in the socket, and a yoke located in the sockct'nnd having its outer ends bent over in the openings in the outer face of the body.

3. A switch handle having a body of insu letting nmterial, said body having a socket opening from the inner surface, grooves on eemse ing the end of the socket and having its 20 prongs occupying the S3161 grooves and their outer ends bent over in the recesses in the outer face of the handle, and a spring illrenged between the yoke and the head of the stem.

JOHANN G. PETERSON.

Witnesses Joeernnm M. STREMPFER, I 1. VVILLiAMS. 

